<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .dis{
            width: 500px;
            height: 100px;
            border: solid 1px #ccc;
            position: fixed;
            left: 50%;
            transform: translate(-50%);
            
        }
    </style>
</head>
<body>
    <button text='危险提示，不可逆操作'>危险</button>
    <button text='来消息了，注意查收'>消息</button>
    <button text='友情提示，注意保暖'>提示</button>
    <button text='警告，警告，该网站会泄漏你的信息'>警告</button>

    <script src="./index.js"></script>
</body>
</html>